Air deflector



B. R. REED AIR DEFLECTOR Jan. 10, 1950 2 Sheets-Sheet 1 Filed July 15, 1948 INVENTOR. EucWZey 7?. Fee 4% ATTU RN EYE Jan. 10, 1950 B. R. REED 2,494,057

AIR DEFLECTOR Filed July 15, 1948- 2 Sheets-Sheet 2 I N VEN TOR.

Buckley 7?. Feed ATTORNEYS l atentecl jan. 10,

UNITED STATES PATENT OFFICE AIR DEFLECTOR Buckley R. Reed, Newton, Mass.

Application July 13, 1948, Serial No. 38,357

Claims. 1

This invention relates to an air deflector and more particularly to an air deflector for use with a high frequency oscillator tube.

l leretofore in using an oscillator tube to meet the severe conditions of radio-frequency heatin service, it has been the practice to use an air blower to force air up through the fins along the exterior of the oscillator tube body for cooling the latter. However, in order to provide cooling air for the filament seals, it has been the practice to use an additional blower disposed above the oscillator tube for forcing air over the filament seals to keep the latter cool.

It is, therefore, the object of the invention to provide means for deflecting the air that is forced along the outer surface of the oscillator tube body onto the filament seals to thereby eliminate the necessit of an additional blower for cooling the seals.

Another object of this invention is to provide an air deflector for an oscillator tube that will maintain thefilament seals at a safe temperature by recirculating the air blown up along the oscillator tube body.

A further object of the invention is to provide an air deflector for an oscillator tube that is so simple and rugged in design that it can be manufactured easily and inexpensively.

ther objects and advantages of the invention will be apparent during the'course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are employed to designate like parts throughout the same;

Figure 1 is a side elevational view of the air deflector attached to an oscillator tube, according to the present invention;

Figure 2 is a top plan view of the device of Figure 1;

Figure 3 is a side elevational View partly in section of a modified form of air deflector;

Figure 4 is a fragmentary side elevational view of the modified form of air deflector of Figure 3 attached to an oscillator tube.

Referring to Figures 1 and 2 of the drawings, the numeral 50 designates an oscillator tube provided with filament leads H and filament seals 12. Spaced below the top of the tube It and arranged inc ircumposed spaced relation with respect to the latter is an annular bracket [3.

Arranged in spaced relation about the tube are the vertically disposed arms l4, l5, and I8 preferably made of brass having a plate thereon. The lower end of each of the arms is shaped so as to define a clamp ll for engagement with the bracket l3. Each clamp l'l embodies a horizontally disposed 'shou1derl8, a first vertically disposed leg 9 dependingly carried by the shoulder and inserted in the space between the inner face of the bracket i3 and thetube ill. The clamp I! further embodies a pair of spaced, parallel vertically disposed legs l9 and 20 arranged in side by side relation with respect to the outer face of the bracket 13 for coacting with leg 9 to thereby lock the arms I4, [5, .and [6 onto the bracket l3.

Arranged in spaced relation above the oscillator tube H3 is an air deflector 2i fabricated of ai non-metallic material of a high dielectric constant. Theair'deflector ii is supported by the upper ends of the arms M, [5, and it Which are secured to the air deflector. 2! by means of rivets 8. The deflector 2! has a cylindrical shaped lower portion 22 and an inwardl curved or arcuately.shapedsupper portion 23* projecting fromthev lower. portion 22.; Arranged centrally in the upper portion 23 is a circular aperture 24 for a purpose to be subsequently described.

In the embodiment shown in Figures 3 and 4 of the drawings, the air deflector 25 is of the same configuration as the previously described air deflector 21 but differs therefrom in the construction of the pair of diametrically opposed arms 26 and 21 for supporting the air deflector 25 on the bracket 38 which surrounds the oscillator tube. In certain instances, the bracket 38 is provided with a pair of diametrically opposed ears 29 and 30, there being a headed bolt 3| in threaded engagement with each of the ears 29 and 3E]. Arranged in superposed relation with respect to the ears 29 and 30 are the vertically disposed arms 26 and 2t, respectively, and each is provided with a slot 33 extending longitudinally thereof for a portion of its length for the reception therein of the bolt 3| to thereby provide a support for the arms 26 and 21.

The upper end of each of the arms 26 and 21 is provided with a transversely disposed flange 35 and 36, respectively, there being suitable rivets 31 for securing the flanges 35 and 36 to the air deflector 25 for supporting the latter above the oscillator tube It.

In the use of the air deflector illustrated in Figures 1 and 2, air is forced upwardly through the oscillator tube IE1 in the direction of the arrows by means of a suitable blower (not shown). This air is then guided by means of the air deflector 2| onto the filament seals l2 and out through the.

opening 24 to thereby keep the filament seals safely cool without requiring an additional or separate air blower for forcing air onto the filament seals.

In Figures 3 and 4, an apertured air deflector 25 is illustrated and is provided with a pair of supporting arms 26 and 21 adapted to be releasably secured to the ears 29 and 30 respectively of the bracket 38 carried by the oscillator tube Ill. The air deflector 25 is used in the same manner as the previously described air deflector 2|.

However, since many other modifications and purposes of the invention will become readily apparent to those skilled in the art upon a perusal of the foregoing description, it is to be understood that certain changes in style, size and components may be effected without a departure from the spirit of the invention and Within the scope of the appended claims.

Having described the invention, claimed as new is:

1. An oscillator tube comprising a plurality of filament seals, a bracket provided with a pair of diametrically opposed ears projecting therefrom, a vertically disposed arm opcratively connected to each of said ears, and an air deflector in spaced relation above said bracket and supported on the upper ends of said arms for deflecting air forced up through said tube onto said filament seals.

2. An oscillator tube comprising a plurality of filament seals, a bracket on said tube, an air deflector in spaced relation above said bracket and supported on the latter for deflecting air forced up through said tube onto said filament seals, said air deflector comprising a lower cylindrical portion and an upper curved portion provided with an aperture therein for the egress therethrough of said air.

3. An oscillator tube comprising a plurality of filament seals, a bracket provided with a pair of diametrically opposed ears projecting therefrom,

What is a vertically disposed arm operatively connected to each of said ears, and an air deflector in spaced relation above said bracket and supported on the upper ends of said arms for deflecting air forced up through said tube onto said filament seals, said air deflector comprising a lower cylindrical portion and an upper curved portion provided with an aperture therein for the egress therethrough of said air.

4. An oscillator tube comprising a plurality of filament seals, an annular bracket mounted on said tube, a plurality of clamps attached to said bracket, a vertically disposed arm projecting from each of said clamps, and an air deflector supported on the upper ends of said arms for defleeting air forced up through said tube onto said filament seals.

5. An oscillator tube comprising a plurality of filament seals, an annular bracket mounted on said tube, a plurality of clamps attached to said bracket, a vertically disposed arm projecting from each of said clamps, and an air deflector supported on the upper ends of said arms for defiecting air forced up through said tube onto said filament seals, said air deflector comprising a lower cylindrical portion and an upper curved portion provided with an aperture therein for the egress therethrough of said air.

BUCKLEY R. REED.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,076,884 Hayden Oct. 28, 1913 1,857,193 Hopp May 10, 1932 2,045,659 Linden June 30, 1936 2,215,200 Usselrnan Sept. 17, 1940 2,285,504 Finch June 9, 1942 2,409,667 Dailey Oct. 22, 1946 

